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Thank you, Bruce, glad to hear you like that stuff.
Lastly, let me conclude by saying that 1.4XTC MkIII doesn't take away any good performance of 600 II. That goes for IQ as well as AF responsiveness. I can not generalize these issues because the TCs are kind of tricky, but the 600 II + 1.4xTC MkIII combo is very very good on 1DX, 1DsMkII and 1DMkIIN. The combo is just nicely sharp and not easy to tell from a bare lens. I did try using the combo on 7D, but the camera couldn't AF well at all, so I dropped that line of testing.
IMO, therein resides the 2nd major strength/benefit of the MkII supertelephoto lenses, including 600 II: excellent (unprecedented) performance with MkIII TCs. (The primary benefit is the weight reduction, in my view.)
Edited on Apr 24, 2013 at 10:35 PM · View previous versions